Drilling-machine.



Patented out. 23, |900, A. .1. eswfofm.-v v DBILLING MACHINE. 1`

(Application lpd Jan. 8; 1900.?

3 Sheets-Sheet l.

'(No Model.)

No. 660,249. Patented out. 2'3, |900.'v

A. .1. mrfonn. DRIL'LING MACHINE.

(Application led Isn. 8, 1900.) No Model.) 3 Sheets-Sheet 2.

ITM/2114:. l: zz.)-

No. 600,249. Patented oct. 23, |900.

A; J. 0|FF-00.

DBILLING MACHINE. l

(Application led Jun. 8, 1900.) A (No Mindel.) l z 3 Sheets-Sheet 3.

UNTTED STATES PATENT OFFICE.

ALBERT J. GIFFORD, OF WORCESTER, MASSACHUSETTS.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent N o. 660,249, dated October23, 1900.

Application filed January 8, 1900. Serial No. 695. (No model.) i

To @ZZ whom it may concern:

Be it known that I, ALBERT J. GIFFORD, a citizen of the United States,residing at Worcester, in the county of Worcester and State ofMassachusetts, have invented a new and useful Drilling-Machine, of whichthe following is a specification.

My invention relates, primarily, to the ordinary form ofdrilling-machines; and the especial object of my present invention is toprovide a simple, efficient, inexpensive, and durable form ofdrilling-machine, having a single operating-handle for raising andlowering the drillspindle and for throwing in and out a train of gearingfor feeding the drill-spindle by power, all of said operations to beattained by rotation of said handle in the same or parallel planes.

To this end my invention consists, primarily, of the combination of thedrill-spindle with a special form of feeding connections, and althoughthis special form of feeding connections has been especially designedfor use in drills, the same may be used to advantage as feeding devicesfor other types of machinery.

A further object of my invention is to provide a drilling-machine withan adjustable stop mechanism for throwing the power-feed ont ofoperation, and to combine the operati ng connections for thedrill-spindle'before referred to with slow-feed connections, which maybe operated by hand when it is desiredl to move the drill-spindle atslow speeds or when the drill-spindle becomes stuck, so as to requirethe exercise of more power in moving the same.

To these ends my invention consists of the parts and combinations ofparts, as hereinafter described,and more particularly pointed out in theclaims at the end of this specification.

In the accompanying three sheets of drawings, Figure l is a sideviewshowing sufficient parts of a drilling-machine to illustrate theapplication of my invention thereto. Fig. 2 is a transversesectionalview of the same. Fig. 3 is a sectional side view taken on the line 3 3of Fig. 2. Fig. 4 is a detail view of the friction-clutch forming partof the power-feed train. Figs. 5 and 6 are detail views illustratingparts of the adjustable stop mechanisms for throwing the power-feed outof operation, and Figs. 7 to 9, inclusive,A are transverse sectionalviews of the rollerclutch controlled by the operating-handle. v

In the use of an ordinary upright drillingmachine the power-feed trainfor feeding down the drill-spindle by power is thrown into operation bythe engagement ot' a toothed or friction clutch operated by a knob orbutton, while the quick approach and withdrawal connections are operatedby a separate and distinct handle, said handle being renderedinoperative for this purpose when the powerfeed is thrown in. When thepower-feed is in operation, the drill -spindle cannot be shifted ormoved by hand, andas now ordinarily constructed an operator is requiredto throw out the power-feed by operating one handle when the machine hasfinished drilling one hole, then to raise the drill-spindle by operatinga separate handle, and after having positioned the work for drilling thesecond hole to lower the drill to the work by the quick-approach handle,the handle controlling the power-feed being again used to start themachine into operation.

The especial obj ect of my present invention is to provide adrilling-machine in which the drill-spindle may always be moved orshifted in either direction by hand, as desired, and in which a singlehandle is employed by rotation in the saine plane for moving thedrillspindle either up or down and for throwing in and out thepower-feed. To accomplish this result, l preferably employ arollerclutch, the operating-handle being connected to transmit directmotion to the clutch-rolls when it is desired to raise or lower thedrillwhen it is desired to feed the drill-spindle by power.

A further object of my invention is to provide a drilling-machine with.a novel form ofstopping connections for throwing the powerfeed out ofoperation. To accomplish this object, I employa frictionclutch forforming part of the power-train, which friction-clutch may be set orreleased by means of a spring connection, the spring connection beingcaused to yield to throw the power-feed out of operation when thedrill-spindle reaches the desired point.

The friction-clutch which ICO transmitting motion thereto.

I employ in connection with these stopping devices also enables me toprovide the machine with a slow-feed handle, which may be utilized toraise or lower the drill-spindle when it is desired to move the same atslower speed or with greater power than is possible from theoperating-handle.

Referring to the drawings and in detail, my drilling-machine as hereinillustrated comprises an upright or pedestal 10, secured on t-op ofwhich is an overhanging casting 11. .Iournaled in the casting 11 is anupright drillspindle 12.4 The drill-spindle 12 is movably mounted orsplined in a bevel-gear 13, which meshes with and is driven from abevel-gear 14, carried by a shaft 15, whichshaft 15 may be driven fromanyordinary source ofpower in the usual manner. At its lower end thedrillspindle l2 is journaled in a quill 16 and is provided with collars,so as to be moved up and down as the quill 16 is raised and lowered. Thequill 16 is provided with a rack 5G for raising and lowering the same.l

The power-feed train for feeding the drillspindle by power, as hereinillustrated, comprises a cone-pulley 2l on the drill-spindle, which isbelted to and drives a cone-pulley 22. Secured to or turning with thecone-pulley 22 is a pinion 23, which meshes with and drives a gear 24,splined on the upright shaft 25. The upright shaft 25 is provided at itslower end with a bevel-pinion 26, which meshes with and drives abevel-gear 27, which bevel-gear 27 is loosely mounted on a shaft 57 andforms one member of a friction-clutch for Secured on the shaft 57 is aworm or screw 29, which meshes with and drives a worin-wheel 30,journaled on a shaft 31 and forming one member of a' roller-clutch, ashereinafter described. As shown most clearlyin Figs. 2 and 3, the shaft3l is provided with a geared section 32, meshing with the rack 56 of thequill 16, so that as the shaft 3l is turned the drill-spindle will beraised or lowered. Keyed onto or secured to the shaft 3l and forming theother member of the roller-clutch referred to is a camsection 33. Thecam or clutch section 33 is notched or provided with oppositely-facinginclines, and fitting into the notches of the cam-section, so as to beinterposed between said cam-section 33 and the other clutch-section 30,are a plurality of rolls 34.

The rolls 34 are illustrated as of cylindrical form; but in theiroperation, as hereinafter described, the function of the rolls 34 couldbe equally well performed by balls or other bodies circular incross-section, and it is to be understood that by the term rolls, ashereinafter employed, I intend to refer to any desired bodies circularin cross-section, which may be wedged between or may coperate with theclutch-sections to form the roller-clutch.

Mounted loosely on the outer end of the shaft 3l is an Operating-handle35, preferably having the form of a cross. Extending in from the handle35 and interposed between the rolls 34 are operating-fingers 36.

In the use of the construction as thus far described the power-feedtrain will normally act to turn or rotate the worm-wheel 30; but byadjusting the roller-clutch, so that the parts assume the positionillustrated in Fig. 7, the worm-wheel 30 will turn loosely, and thepower-feed for the drill-spindle will he rendered inoperative. When itis desired to bring the power-feed into operation, a slight movement ofthe handle 35 will wedge the rolls 34 between the parts of theroller-clutch, as illustrated in Fig. 9, so that the wormwheel orclutch-section 30 will feed down the drill-spindle. 'Phe greater theresistance encountered bythe downward feed of the drillspindle the moretightly will the rolls be wedged in place between the clutch-sections,insu ring an accurate and powerful down-feed. At the saine time, nomatter what position may be occupied by the rolls, the operatinghandlemay be turned to move the drill-spindle either up or down, as desired,by hand. For example, if the parts are in the normal positionillustrated in Fig. 7 and it is desired to raise the drill-spindle theoperatinghandle will be turned to the right, as illustrated in Fig. 1,so that the fingers 36 will transmit pressure through the rolls 34 tothe cam or clutch section 33, turning` the shaft 3l and raising thedrill-spindle, as desired, while the rolls 34 will simply slip or rollon the inner surface of the worm-wheel 30. On the other hand, supposethat the power-feed is acting, the parts standing in the positionillustrated in Fig. 9, and it is desired to move the drill-spindledownward more rapidly. This is a condition which frequently arises, forexample, in boring out two bosses arranged in line with each other, inwhich case after the drill has passed through the first boss it isdesirable to move the same down to engage the second boss. If thisaction is desired, the operating-handle, as illustrated in Fig. 1, willbe turned toward the left. This will cause the operating-lingers 36 totransmit pressure through the rolls 34 to the cam -section 33, carryingthe drill-spindle down, while the balls simply roll ahead or slipforward on the inner surface of the wormwheel. By means of thisconstruction it will be seen that I have provided a drilling-machinewhich is capable of more simple and direct operation than machines whichhave heretofore been employed, as all the normal operations of themachine are controlled from a single handle, all motions of which are inthe same plane, which acts not only to raise or lower the drill-spindle,as desired, but which also serves to throw in or release the powerfeedtrain, as required. The mere fact of bringing the drill to the Work bythe handle 35 starts the power-feed, while a slight reverse rotationstops or prevents it.

In some cases it may be desirable-for example, in tapping nuts or insimilar opera- TOO ros

TIO

tionsto secure a rigid connection between the'operating-handle and theraising and lowerin g shaft 3l, so as to prevent any possibility of thepower-feed beingthrownin. When this operation is desired, a set-screw37, as shown in Fig. 2, may be screwed in to engage a notch in theraising and lowering shaft to secure the operating-handle and raisingand lowering shaft rigidly together.

The automatic stopping connections which I may employ for automaticallythrowing out the power-feed when desired are most clearly illustrated inFigs. 2 to 6, inclusive. As shown most clearly in Figs. 3 and 4, thefriction-clutch, having one of its members formed by the bevel-gear 27,comprises an inner clutch member 40, which is keyed to or secured to theshaft 57. To connect the clutch members 27 and 40, I employ anormallycontracted springring 4l, which may be arranged as most clearlyillustrated in Fig. 4. A taper-ended expanding-pin 42 is mounted inthe'clufch-section 40, and in order to operate the expanding-pin 42 Iemploy a yielding or spring connection comprising. an operating pin 43,having an inclined or cammed end engaginga corresponding end of thewedging-pin '42. A screw 45, having a knuried head, may be operated tocompress a coiled spring 44 to force in the operatingpin 43, so that thewedging-pin 42 will eX- pand the spring-ring 41 to connect theclutchsections.

'lo form an automatic stop for th rowing out the power-feed of thedrill, I employ an adjustable stop-pin carried by the quill, which actsthroughintermediate connections to compress the spring 44 and releasethe clutch, so as to stop the down-feed of the drill. most clearlyillustrated in Fig. 2, a stop-pin 4G basa head fitting into a dovetailgroove in the quill lo'. The stop-pin 46 may be clamped in its adjustedposition by a nut 47, and the stop-pin 46 is arranged to engage aninclined or cam face of a yoke 48, as shown on an enlarged scale inhigs. 5 and 6. The arms of the yoke 48 are arranged to engage a collar49, connected to the operating-pin 43 and having a slight movementlengthwise on shaft 57, so as to force the operating-pin 43 back andrelease the clutch when the desired' downward limit' of travel has beenreached. The friction clutch as thus constructed and mounted in thepower-feed train of a drill embodying my invention also permits me toemploy a slow-feed handle, which may be used when it is desired to movethe drill-spindle more slowly or with greater power than is possiblefrom the operating-handle.

As shown in Figs. l and 3, a slow-feed handle 50 is secured on the endof the shaft 57, and in order to use the slow-feed handle it is simplynecessary to release the friction-clutch by unscrewing the screw 45, andby then throwing in the roller-clutch from the operating-handle 35 theslow-feed handle may be used to raise or lower the drill-spindle, asdesired. y For example, whenever a' drill becomes stuck or so firmlyembedded in the Work that it cannot be Withdrawn by operating theordinary operating-handle 35 the operating-handle 35 may be movedslightly to the right to wedge the clutch-rolls in the positionillustrated in Fig. 8, so that by then turning the slow-feed handle 50 amore powerful connection maybe secured for lifting the drill-spindlethan could be secured from the direct operatingshandle 35.

I am aware that numerous changes Amay be made in the construction of mydrilling-machine by those who are skilledin the art and that the feedingdevices as herein combined and operated may be used to advantage inother machines as well. I do not wish, therefore. to be limited to theconstruction herein shown and described; but l What I do claim, anddesire to secllre by Letters Patent of the United States, is-

l. In a drilling-machine the combination of a drill-spindle, apower-feed train therefor, and a single handle connected so that saidhandle may be rotated to effect a hand-fed drilling operation, theraising or lowering of the drill-Spindle, and theuthrowing` in or out ofthe power-feed train, substantially as described.

2. In adrilling-machine, the combination of a drill-spindle, apower-feed train therefor, a roller-clutch, and a single handleconnected to transmit by rotation in the same or parallel planes directmotion' to the clutch-rolls when it is desired to raise or lower thedrillspindle, and to secure a hand-fed drilling operation, and to wedgeor unwedge the clutchrolls when it is desired to throw in or out thepower-feed train, substantially as described.

3. Inadrilling-machine,thecombination ot' a drill-spindle, aroller-clutch comprising a power-driven clutch-section, a notchedcampiece, and 'rolls interposed between The campiece and clutch-section,and a single handle connected so that by rotation it may transmit directmotion to the clutch-rolls when it is desired to secure a hand-feddrilling operation, and may wedge or unwedge the clutchrolls to throw inor out the power-feed train, substantially as described.

4. Ina drilling-machine, the combination of a'drill-spindle, apower-feed train therefor, a

i roller-clutch, and a single operating-handle having fingers interposedbetween the clutchrolis so that by turning the handle a direct motionmay be transmitted to the clutch-rolls when it is desired to secure ahand-fed drilling operation, and so that the clutch -rolls may be wedgedwhen a power feed is desired, and unwedged to disconnect the power-feed,substantially as described.

. 5. In a drilling-machine, the combination of a drill-spindle, aroller-clutch comprising a power-driven clutch-section, a notched`campiece, and rolls interposed between the campiece and clutch-section,and a single handle having operating-fingers interposed between IOO theclutch-rolls so that by turning said handle a direct motion maybetransmitted to the clutch-rolls when a hand-fed drilling operation isdesired, and the rolls may be wedged when a power-feed is desired, andunwedged to release the power-feed, substantially as described.

6. In a drillin g-lnachin e, the combination of a drill-spindle, a shaftgeared to raise and lower the same, a roller-clutch comprising a power-driVen clutch-section j ournaled loosely on the raising and loweringshaft, a notched cam-piece, rolls interposed between the campiece andclutch-section, and a single handle connected so that by turning saidhandle a direct motion may be transmitted to the clutchrolls when ahand-fed drilling operation is desired, and the clutch-rolls may bewedged when a power-feed is desired, and unwedged to release thepower-feed, substantially as described.

7. In a drilling-machine, the combination of a drill-spindle, a shaftgeared to raise and lower the same, a roller-clutch comprising apower-driven clutch-section journaled loosely on the raising andlowering shaft, a notched cam-piece secured rigidly on the raising andlowering shaft, rolls interposed between the cam-piece andclutch-section, and a handle having operating-fingers interposed betweenthe clutch-rolls, whereby a direct motion may be transmitted through theclutch-rolls to secure a hand-fed drilling operation, and' theclutch-rolls may be wedged to secure a powerfed drilling operation, andunwedged to release the power-feed all by turning or rotating saidhandle, substantially as described.

S. In a drillingmachine,the combination of a drill-spindle, a power-feedtrain therefor, a single handle connected so that a hand-fed drillingoperation, a power-fed drilling operation, and a release of thepower-feed train may all be secured by rotating said handle, and anadjustable stop mechanism for automatically throwing the power-feedtrain out of operation, substantially as described.

9. In a drilling-machine, the combination of a drill-spindle, apower-feed train comprising a clutch, a spring connection for settingand releasing the clutch, and an adjustable stop mechanism for causingthe spring connection to yield to throw the power-feed out of operation,substantially as described.

IO. In a drilling-machine, the combination of a drill-spindle, apower-feed train, a friction-clutch comprising two clutch-sections, a

normally-contracted spring-ring for connecting the clutch-sections, anexpanding-pin, a spring connection for operating the expanding-pin toset or release the clutch, and an adjustable stop mechanism for causingthe spring connection to yield to throw the powerfeed out of operation,substantially as described.

11. In a drilling-machine the combination of a drill-spindle, extendingthrough a quill, a power-feed train for raising and lowering the quill,a clutch, a spring connection for setting and releasing the clutch, anda stop-pin adjustably mounted in the quill and operatingthroughintermediate connectionsto cause the springconnection for theclutch to yield to throw the power-feed out of operation, substantiallyas described.

12. In a drilling-machine, the combination of a drill-spindle, extendingthrough a quill, a power-feed train for raising and lowering the quill,a clutch comprising two clutch-seci tions, a normally-contractedspring-ring for connecting the clutch-sections, an expandingpin, aspring connection for operating the expanding-pin to set or release theclutch, a stoppin adjustably mounted in the quill, and a swinging yokearranged to be engaged by the stop-pin to cause the spring connection toyield to throw the power-feed out of operation, substantially asdescribed.

13. In a drilling-machine,the combination of a drill-spindle, a shaftgeared to raise and lower the drill-spindle a roller-clutch comprisingan outer ring or clutch-section, a cam or second clutch-section securedon the shaft and having oppositely-faciuginclines or cams, and rollsinterposed between said clutch-sections, a slow-feed handle geared toturn the outer ring or clutch-section, and a single operating-handlearranged to transmit by rotation in the same or parallel planes `directmotion to the clutch-rolls when it is desired to raise or lower thedrill-spindle, and to wedge said rolls in either direction when it isdesired to raise or lower the drill-spindle from the slow-feed handle,substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

ALBERT J. GIFFORD.

Witnesses LoUIs W. SOUTHGATE, PHILIP W. SOUTHGATE.

IOO

